portrait painted around 1900-1910 depicting Marthe de Florian herself in a beautiful pink muslin evening dress, painted by one of her lovers, the artist Giovanni Boldini. The portrait had never been listed, exhibited or published, however a visiting card with a scribbled love note from the painter was found in the apartment, and a short reference found in a book from 1951 commissioned by the artist's widow Emilia Cardona also confirmed the provenance of the painting Marthe de Florian (born Mathilde Héloïse Beaugiron; 9 September 1864 – 29 August 1939) was a French demimondaine and socialite during the Belle Époque. She was known for having famous lovers including Georges Clemenceau, Pierre Waldeck-Rousseau, Paul Deschanel, Gaston Doumergue, Robert de Montesquiou, and Giovanni Boldini.